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Posted to hdfs-issues@hadoop.apache.org by "Fang-Yu Rao (JIRA)" <ji...@apache.org> on 2018/05/24 16:20:00 UTC
[jira] [Assigned] (HDFS-13612) Short-circuit read: unknown response
code ERROR
[ https://issues.apache.org/jira/browse/HDFS-13612?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Fang-Yu Rao reassigned HDFS-13612:
----------------------------------
Assignee: Fang-Yu Rao
> Short-circuit read: unknown response code ERROR
> -----------------------------------------------
>
> Key: HDFS-13612
> URL: https://issues.apache.org/jira/browse/HDFS-13612
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.6.0
> Environment: CDH5.13.3, Kerberized, HBase, hedged reader, short circuit read.
> Reporter: Wei-Chiu Chuang
> Assignee: Fang-Yu Rao
> Priority: Major
>
> Found the following warning in a HBase RS log:
> 2018-05-19 13:13:00,310 WARN org.apache.hadoop.hdfs.BlockReaderFactory: BlockReaderFactory(fileName=<REDACTED>, block=BP-297993939-10.0.0.1-1402080332426:blk_1816287870_744594480): unknown response code ERROR while attempting to set up short-circuit access. Block BP-297993939-10.0.0.1-1402080332426:blk_1816287870_744594480 is not valid
> Checking the code, if the request fails because of block access token (invalid access token), BlockReaderFactory#requestFileDescriptors expects error code ERROR_ACCESS_TOKEN. However, on the DataNode side, DataXceiver#requestShortCircuitFds emits ERROR if an IOException is thrown.
> So ERROR is expected and BlockReaderFactory#requestFileDescriptors should handle it better.
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